Carbon Limit

Carbon Limit is a Boca Raton, Florida-based producer and supplier of low-carbon additive technologies for the cement and concrete industry. Its flagship product, CaptureCrete, is a powder admixture added to concrete mixes that is intended to enhance concrete performance, allow a reduction in cementitious content, and enable atmospheric CO2 to be captured and permanently mineralized within concrete surfaces. Applications cited by the company span homes, buildings, bridges, roads, pavers, blocks and data center construction. A second product line, CoolCrete, is a cooling additive designed to make concrete reflect more sunlight and absorb less heat in order to mitigate urban heat island effects; company data cited in press coverage indicates concrete temperature reductions of up to six degrees Celsius, and the product is described as able to replace up to 40% of conventional cement.

The company pairs its materials with a carbon credit issuance program. Working with ready-mix concrete producers, third-party verifiers and credit registries, Carbon Limit generates avoidance credits (from reduced cementitious material use) and blended credits (combining cementitious reduction with quantified, mineralized CO2 stored in concrete). It states it is registered with Verra under the Verified Carbon Standard following the VM0043 methodology for ready-mix concrete CO2 mineralization, and references standards including the Verified Carbon Standard, Gold Standard and Climate Action Reserve. CaptureCrete was also validated by Bureau Veritas under the Covalent Certification Standard.

Earlier coverage described a different product configuration: a shipping-container-based, solar-powered direct air capture system that filtered atmospheric CO2 to produce a cement alternative, which the founder said captured 20 tons of CO2 every five to seven days. The company's later public materials center on admixtures sold and licensed to concrete producers rather than standalone capture units.

Founding story

Founder and CEO Tim Sperry, described as an entrepreneur and scientist, started the company with co-founder Oro Padron to address carbon emissions from concrete, initially developing a solar-powered, shipping-container-based direct air capture system that converted atmospheric CO2 into a cement alternative. The startup developed at FAU Tech Runway's accelerator in Boca Raton and later participated in an Indianapolis accelerator co-sponsored by Techstars and The Heritage Group to complete R&D.

Business model

Carbon Limit supplies and licenses concrete additive technologies to cement and concrete producers and manufacturers, engaging them through a staged commercial process: a strategic partnership agreement framed around a "Projected Customer Minimum Margin," joint testing program planning, on-site laboratory or field performance and carbonation testing, review of results to establish a "Confirmed Customer Minimum Margin," and finally product fulfillment with data integration and post-sale technical support. Data integration with customers supports processing, validation and commercialization of carbon credits, with net proceeds shared between the parties.

Revenue derives from sales and licensing of admixture products to concrete and cement producers and from carbon credits generated by deployment of CaptureCrete, which are commercialized with net proceeds shared with producer partners. Earlier company statements also described selling captured CO2 as carbon credits, claiming U.S. government tax credits per ton captured, and selling cement aggregate to concrete, cement and asphalt companies.

Traction

Publicly described deployments and relationships include a Minnesota Department of Transportation project begun in 2022 to test lower-carbon concrete as part of a multi-year study, concrete blocks with Titan America, a data center project referencing Google, concrete pavers with NCP Industries, and licensing partners NCP Industries and Bison Innovative Products for CoolCrete. Company newsletters report Verra registry approval of its project in 2025 and commercial deployment milestones for CaptureCrete and its automated dosing systems. The company has also reported interest in large projects in the Middle East.

Latest developments

Recent company communications describe the first commercial CaptureCrete system going live, availability of automated dosing systems, documentation of permanent CO2 removal, a recognition at IBS 2025, and work combining 3D concrete printing with carbon capture. Gabriel Carrero was appointed Chief Commercial Officer, and the leadership page lists roles including President, COO, CFO and CTO.